Centrifugal liquid-separator.



No. 66!,943. Patented Nov. 20, I900. F. J. AREND. CENTRIFUGAL LIQUIDSEPABATOR.-

(Application filed Sept. 19, 1898.1

3 Sheets-Sheet I.

(No. Model.)

No. 66!,943. Patented Nov. 20, I900.

' F. J. ABEND.

CENTRIFUGAL LIQUID SEPARATOR. (Application inea 59151:. 19 1898.)

(No Model.) 3 Sheets-Shag! 2.

Uwrrno mares FRANCIS J. AREND, OF NEW YORK, N. Y., ASSIGNOR TO THE DELAVAL SEPARATOR COMPANY, OF NEW JERSEY.

CENTRIFUGAL LIQUID-SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 661,943, dated November20, 1900. Application filed $eptember 19, 1898, Serial No. 691,294. (Nomodel.)

.120 aZZ whom it may concern.-

Be it known that l, FRANCIS J. AREND, a citizen of the United States,residing at New York, county of New York, and State of New York, haveinvented a new and useful Improvement in Centrifugal Liquid-Separators,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, which form a part ofthis specification.

This invention relates to that class of centrifugal liquid separators inwhich blades or disks are used which intersect the radial line of thebowl and are used to increase the 3 separating ca pacity and theefiiciency or closeness of the separation. In this class of devicesupright curved division plates or blades have been used which werehinged together or to a common ring, so that they could be unfolded forcleaning purposes. Where such upright division-plates loosely connectedwith each other have been used, they were so placed in the bowl thatunder the action of centrifugal force these blades would swingorspreadon their loose or movable connection until their outeredges contactedwith the peripheral wall of the bowl within what may be technicallytermed the peripheral skim-milk space or passage-way. l have discoveredthat this latter action is disadvantageous in that when the bladescontact with the peripheral wall of the bowl there is left aninsufficient space for the skim-milk, which space rapidly clogs up aftera few minutes use with the dirt and fibrous matters contained in themilk. As soon as this occurs the skim-milk zone is gradually contractedinwardly, and the skimmilk instead of going to the peripheral spacesbetween the ends of the blades goes upward between the blades and theefficiency of separation commences to deteriorate, and as the operationcontinues the deterioration increases. Again, mechanically suchconstruction is faulty. The blades should be made of a curve of about aquarter or more of a circle to give them practicable separation-surface.They m-ust also fit quite closely together for nearly their full length,allowing for spacing projections keeping them from actually touchingeach other when in position in the bowl. If the blades be madesufficiently loose to permit of their spreading out against theperipheral wall of the bowl under the action of centrifugal force,'itisdifficult to make them fit closely enough to insure practical efficiencyof separation. If they are made to fit closely enough to insureefficient separation, the handling necessary in ordinary use-putting inand taking out, cleaning, and the like-\vill soon get them into suchcondition that it is impossible to compress them sufficiently to get thedevice in the bowl or out of the bowl when once in. The greatest causeof these troubles is intending or allowing the blades when in the bowlto be acted upon by centrifugal force.

The object of my invention is to provide a construction whereby bladesloosely or movably connected together and intersecting the radial lineof the bowl may be used, so as to have the advantage of convenientcleaning and yet maintain their contact or position with reference toeach other and enable their being readily inserted in and retnoved fromthe bowl. Speaking generally, I accom plish this by encircling theexterior of the blades with a band or series of bands provided withprojections which prevent their contacting directly with the innerperipheral wall of the bowl. These bands may be placed around the bladesbefore inserting in the bowl or may be attached to or tnade a part ofthe interior of the bowl. In the latter case the blades are placedwithin these bands.

I will now describe the embodiment of my invention illustrated in theaccompanying drawings, in which-- Figure l is a sectional View on theline 1 1, Fig. 2. Fig. 2 is a plan view. Fig. 3 is a detail perspectiveof part of one of the bands. Fig. 4 is a detail perspective view of partof theinterior of the bowl with one of the bands. Fig. 5 is a plan viewof the blades removed from the bowl and open. Fig. 6 isa perspectiveView of the blades removed from the bowl with removable band. Fig. 7 isa partial side elevation of a modified form of band. Fig. 8 is a partialplan view of a split-ring band. Fig. 9 is a plan view of a modified formof the band shown in Fig. 7.

A is the shell of the bowl, B the top and B the neck. The bowl shown isused for the separation of cream from milk.

0 is the skim-milk pipe, leading to the skimmilk outlet 0, and D is thecream-outlet.

E is the inlet feed-pipe.

F is a series of upright plates or blades intersecting the radial lineof the bowl, preferably having projections f to maintain proper spacebetween them. These blades are hinged at their inner ends to rings f byvertical pivot-pins f so that they are loosely or movably connected witheach other and maybe unfolded, as shown in Fig. 5. I do not intend tolimit myself to any particular way of loosely or mox ably connecting theinner ends of these blades with each other to enable them to be openedout, as this may be accomplished in many ways.

G represents bands or rings provided with projections g. These bandsencircle or surround the exterior of the blades and are of such size indiameter as to compress the blades the proper amount to bring them intocorrect position with reference to each other.

The projections g provide a free space be tween the bands G and bladesand the inner peripheral wall of the bowl.

I do not intend to limit myself to any particular form of band or ringnor to any particular form of project-ion on the ring or other means ofcreating suilicient flow-passages for the skim-milk. The band may be acontinuous ring slipped over the blades before insertion in the bowl, asshown in Figs. 2 and l, or its end may be drawn and clamped togetheraround the blades, as shown in Fig. 6, or it maybe a split ring, asshown in Fig. 8, in which case the bands may be secured around theexterior of the blades and open to release them, or the band may also beplaced in the bowl, as shown in Fig. 4, bysecuring it to the bowlthrough the projections shown. The bands may be of metal or othersuitable material. The bands may fill the space between the blades andthe wall of the bowl and be provided with holes or perforationsaifording flow-passages, as shown in Fig. 7, or the bands may beotherwise made irregular in shape, so as to afford flow-passages alongtheir inner or outer surfaces, or both, as shown in Fig. 9. As maybeseen, with this improved construction the blades may still bereadilyseparated for convenient cleaning purposes, and yet arecompressed in action to the desired amount and are prevented fromexpanding, thus enabling the separation to be carried on effectively andthe device kept in practicably usable condition.

As may be seen, the broad idea of my invention is the use of bladesloosely connected together at their inner ends, which intersect theradial line of the bowl, but which are prevented from contacting withthe peripheral wall of the bowl.

When the words loosely or movably are used in the specification, theyareintended to mean capable of independent movement and not rigidlyimmovably connected.

Having now fully described my invention, what I claim, and desire toprotect by Letters Patent, is

1. The combination with the bowl of a centrifugal liquid-separator, of adivision contrivance consisting of a series of upright division-plates,loosely connected with each other at their inner ends and intersectingthe radial line of the bowl, and means to prevent the outer ends of theblades cont-acting with the wall of the bowl.

2. The combination with the bowl of a centrifugal liquid-separator, of adivision contrivance consisting of a series of upright division -plates,loosely connected with each' other at their inner ends, intersecting theradial line of the bowl, means to support the outer ends of said bladesand prevent the same from contacting with the wall of the bowl.

3. The combination with the bowl of a centrifugal liquid-separator, of adivision contrivance consisting of a series of upright division plates,loosely connected with each other at theirinnerends, intersecting theradial line of the bowl, and one or more bands independent of andsurrounding the outer portion of said blades.

4. The combination with the bowl of a centrifugal liquid-separator, of adivision contrivance consisting of a series of upright division plates,loosely connected with each other at their inner ends, intersecting theradial line of the bowl, and a band or hands provided with projectionssurrounding the outer portion of said blades.

5. The combination with the bowl of a centrifugal liquid-separator, of adivision contrivance consisting of upright division-plates, looselyconnected with each other at their inner ends, intersecting the radialline of the how], a band or bands provided with projections surroundingthe outer portion of said blades, said band being connected to the bowl.

In testimony of which invention I have hereunto set my hand at New York,N. Y., this 12th day of September, 1898.

FRANCIS J. AREND.

